Public Utilities, Earning Test, Over-Earning Credit To Customers, Approved

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Public Utilities, Earning Test, Over-Earning Credit To Customers, Proposed

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Public Utilities, Recommended Disallowance Purchased Power

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Percentage of public utility's requested debt to capital, including debt and equity.

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Percentage of public utility's requested equity to capital, including debt and equity.

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Amount of public utility's requested rate increase (decrease) with regulatory agency.

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Percentage of public utility's requested return on equity.

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The amount for the individual regulatory liability as itemized in a table of regulatory liabilities as of the end of the period.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 980
-SubTopic 405
-Name Accounting Standards Codification
-Section 25
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477571/980-405-25-1

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RATE MATTERS - I&M Rate Matters (Details) - INDIANA MICHIGAN POWER COMPANY - USD ($) $ in Thousands	1 Months Ended
	Aug. 31, 2026	Jul. 31, 2026	Oct. 31, 2025	Sep. 30, 2026	Jun. 30, 2026	Feb. 28, 2026
Public Utilities, General Disclosures [Line Items]
Earning test, over-earning credit to customers, proposed	$ 66,000			$ 66,000		$ 53,000
Earning test, over-earning credit to customers, approved					$ 53,000
IURC, Over Earnings
Public Utilities, General Disclosures [Line Items]
Regulatory liability				$ 97,000
2024 Michigan Power Supply Cost Recovery \| OVEC ICPA, Cost Disallowance
Public Utilities, General Disclosures [Line Items]
Public utilities, recommended disallowance purchased power		$ 1,000
2024 Michigan Power Supply Cost Recovery \| Rockport UPA, Cost Disallowance
Public Utilities, General Disclosures [Line Items]
Public utilities, recommended disallowance purchased power		$ 0
2024 Michigan Power Supply Cost Recovery \| Minimum
Public Utilities, General Disclosures [Line Items]
Public utilities, recommended disallowance purchased power			$ 259
2024 Michigan Power Supply Cost Recovery \| Maximum
Public Utilities, General Disclosures [Line Items]
Public utilities, recommended disallowance purchased power			$ 14,000
2026 Indiana Base Rate Case
Public Utilities, General Disclosures [Line Items]
Requested annual base rate decrease	$ 42,000
Requested return on equity	10.10%
Requested debt capital structure	48.80%
Requested equity capital structure	51.20%